Cement well strainer



INVENTOR @www G. W. WODS CEMENT wELil STRAINEE Filed oct. 27, 1931 Feb. 7, 1933*.

GORHH YZ WOODS PatentediFeb. 7, 1933 'PATENT vorifici-z connu: w. woons, or nous'ron, rmras, Assmann. Iro aucuns Toor. conm, oir-y noUs'ioN, Texas, a conrona'rlon or Taxes CZEmTWELL My invention relates to well stainers to be used in filtering the fluid enteringA the well from theproducing formation.

f The strainer most commonly employed in deep lwell operations for oil, gas and the like includes a pipe having perforations or lopenings in the pipe graduated to the proper size-v of opening to accommodate the particular material in which. the strainer is set. v

It is an object of my invention to provide a strainer whichrnay be formed in position' inthe well and which ma be easily modified' to suit the state of the ormation in which the production occurs and which vmay be made inexpensively.

It is also an object to rovide a well strainer which not easily become worn or broken.

In the drawing verticall sectiona view lthrough a strainer embodying my invention shown in position at the ttoin ofthe well.

In producing m particular well strainer, Ihcontemplate d ing the well down into t e tom as been' reached toemploy an underreamer to enlarge the opening as shown at 2 solas to form a cavity about the lower -end of the well casing' into which the water:T gas or the like may be received. After this `avity 2 has been formed by the use of the underreamer,`1 set the casing 3 with the lower end projecting somewhat into the cavity. I then force cement 4 downwardly through the' casing to completely fill the` cavity s which has been underreamed. A

.This cement may be discharged position by any well known manner. I contemplate forcing the same to the bottom by a lock or piston moved downwardly by vpump pressure. The cement may be ordinary hy' draulic cement but' I contemplate making the said cement outof the mixture with hy draulic cement vof the proper composition, of sand ofthe deredsize to make the cement porous lo as to allow the filtering there- `through'of uid. It will be obvious .that

this cement may be made of the'- .propfer proportions of sand and cement and ofthe suiti able coarseness of sand so that it will allow herewith I have shown a reducing stratum and after the bei.-

deep well comprisin enlar various sizes of openings therethrough depending upon-the proportions of the mixture and the size of the sand or crushed rock makin up the aggregate employed. This will, o course, vary as to the composition of the material in which the producing stratum is found and may be varied according to the judgement of the driller in each instance.

When this cement has beenallowed to set I and become fixed within the cavity 2, a drill maybe lowered to the bottom of the well and a bore opening shown at 5 may be drilled into the block of cement to a Apoint spaced from the lower end of the cavity. This provides Aa chamber into which the oil or gas filter from the formation to the well may an said uid may then be removed in the usual manner.

It will be seen that my form of strainer may be placed in .position without diliiculty and will form a screen which is strong and notliabl'e'to break or fail in use and which willfbe adaptable for any type of formation in which the well may be drilled.

What I claim asnew is: L 1. In a well having a casing therein, the

"is y.

method of forming a well strainer on said casin comprising, reaming an'enlarged cavity', orcing cement which forms a` porous ilte medium upon setting into said cavity, an drilling a fluid receiving recess into said cement as a continuation of said casing. 2. The method of forming a strainer in a the bore of the well in the pr ucing ormation, filling Asaid enlarged portion withY cement which f or'ms a porous filtering medium uponset.-

ting, and a fluid receiving recess into alge said cement as a continuation of the weli re. f

In testimony whereof, I hereunto my signature this the 21st day of ,October, A. D.,

1931. l GoRHAM w. woons.

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